Doctrine cannot map entity/repository namespace in chain

Question

I\'m trying to setup symfony with doctrine, configuring doctrine is new for me.

I try to retrieve a entity from the database by using the following code in my controller

Answer 1

After a long struggle I found out what caused the problem. My symfony environment was running in prod mode. I switched to dev. And it all worked like a charm.

But i'm still wondering why?! I checked The AppKernel.php and it looks like:

$bundles = [
    new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
    new Symfony\Bundle\SecurityBundle\SecurityBundle(),
    new Symfony\Bundle\TwigBundle\TwigBundle(),
    new Symfony\Bundle\MonologBundle\MonologBundle(),
    new Symfony\Bundle\SwiftmailerBundle\SwiftmailerBundle(),
    new Doctrine\Bundle\DoctrineBundle\DoctrineBundle(),
    new Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle(),
    new AppBundle\AppBundle(),
];

if (in_array($this->getEnvironment(), ['dev', 'test'], true)) {
    $bundles[] = new Symfony\Bundle\DebugBundle\DebugBundle();
    $bundles[] = new Symfony\Bundle\WebProfilerBundle\WebProfilerBundle();
    $bundles[] = new Sensio\Bundle\DistributionBundle\SensioDistributionBundle();

    if ('dev' === $this->getEnvironment()) {
        $bundles[] = new Sensio\Bundle\GeneratorBundle\SensioGeneratorBundle();
        $bundles[] = new Symfony\Bundle\WebServerBundle\WebServerBundle();
    }
}

return $bundles;

It seems to me no matter what environment I run, doctrine is loaded. Can somebody explain to me the reason behind this behaviour.

EDIT:

I discovered something more, I switched to prod environment again but now I started flipping debugging on/off.

Now I see that is works nicely in production mode but only when debugging is enabled. Why?